Automatic shut-off device for burners



A. U. SARNMARK.

AUTOMATIC SHUT-OFF DEVICE FOR BURNERS. APPLICATIQN FILED APR.3, 1919.

. ].,364:,145. Patented Jan. 4, 1921.v

Iii/verifier.- 11162 Una fidz nmarR,

Gottcnborg,

new and useful Improvements in Automatic UNITED. STATES AXEL. UNO SARNMARK, or oo'r'rmmond,

PATENT OFFICE.

SWEDEN.

AUTOMATIC SHUT-OFF DEVICE FOR BURNERS.

To all whom it may concern:

Be it known that I, Axial. l No SIinNMAuK, subject of the King of Sweden, residing at Sweden, have invented certain Shut-Off Devices for Burners, following is a specification.

This invention relates to automatic shutoff devices for burners and the object is more particularly to provide means for shuttin off the supply offuel to the burner should, for any reason, the flame thereof be extinguished. T he invention consists of the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims.

Referring to the drawings wherein I have, merely for illustrative purposes, disclosed one embodiment of my invention:

Figure 1 is aplan View of a burner equipped with a shut-off device embodying the features of this invention, the parts thereof being shown in their normally closed positions;

Fig. 2 is a plan viewsimila'r to Fig. 1 illustrating the parts 'in the positions. occupied thereby when the burner is lighted; and

Fig. 3 is a thermostat.

In the drawings, 1 is a stand and .2 a

'd stand. A therburner supported upon sa mostat 3 herein consisting of a thin-walled metal cylinder or tube is arranged adjacent to the burner 2 with one end thereof fixed to the stand 1 by a nut 4. This thermostat is connected herein by pin 5 with alever 6 which in turn is ful crumed upon a pin 7 fixed in stand 1. The positions of the pins be varied in their relation to each other in order that the throw of the lever 6 may be changed as desired. The lever 6 is herein included in means to check the movements of the valve hereinafter described for controlling the supply of fluid, either liquid or gaseous, to the burner 2 and in addition to said lever 6 l have herein provided resilient means, interposed between said lever and portions of the valve referred to, whereby of which the detail transverse section of the certain variations may take place in the cludes a stop-pin 9 slidably mounted in said Specification of Letters Patent.-

and to the end of said means of a pivot 01'' 5 and 7 may obviously the stop-pin 9 is set lever 6 and secured thereto by means of a spring 8 which is fastened to said lever 6 pin 9. A press-button 10 is attached to said spring to facilitate the manual movement of said pin with respect to said lever.

The pin 9 is arranged to engage the teeth of a ratchet 11 secured to and movable with the valve 12, hereinbefore referred to, and.

serves to check further movements of said valve as long as such engagement is maintained. The valve 12 is herein shown as a self acting valve, it being connected by means of a spring 13 attached to the operating lever thereof, with a portion of the Patented Jan. 4, 1921.

Application filed April 3, 1919. Serial No. 287,377.

stand 1, the normal tendency of the spring 13 being in the present example to close said valve.

If the gas is to be lighted the valve 12 is first opend by hand so that the gas will be permitted to pass from the main supply tube or pipe into the burner 2. \Vhen the gas is ignited the flame produced thereby is adapted to engage the thermostatic tube 3 and cause it to expand or become. elongated, and the movement produced by this expansion is transmitted to and effects the rocking of the lever 6 about its pivot 7 thus causing the end of the pin 9 to engage the ratchet or toothed disk 11. Until the tube -3 has expanded sufliciently to move the pin 9 into engagement with said ratchet, the valve 12 must be held in the desired position by hand, extending the spring 13.

As indicated in the drawings the ratchet diskis provided with a plurality of teeth plurality of positions in order that the amount of fuel to the burner may be regu latedto provide the desired intensity of heat or light as the case may be.

By providing the resilient means including the spring 8 it will be obviousthat there may be considerable variation inthe expansion and contraction of the tube 3 provi with respect to the lever 6 so that the initial movements of said lever. will effect the engagement of the stoppin with the teeth of said ratchet. Upon expansion of said tube 3 from its position shown in Fig. 1 toward and into that shown in Fig. 2 so as to move the lower end of the pin 9 into engagement with selected teeth of the ratchet 11. Should there be further expansion after said pin has engaged said ratchet, the

ded

the lever 6 moves I of the tube 3 deflection of the resilient member orv .spring'8. H a Should for any reason the flame be ex- *tinguishe d and the part 3 permitted to cool such regulate the same the by hand so as to withdraw the pin 9 from closed and discussed lever 6 will continue to move while the pin 9 will remain and contract the lever 6 will be returned by- 'contraction to its original position, as shown in Fig. 1 and after the idle movement of the lever 6 relatively to the pin 9 has been taken up by the action of the withdrawn from then acts automaticall and therebyshut-ofit e supply of fuel to the burner.' When it is necessary or desirable to shut-01f the supply of fuel or to button 10 is pressed engagement with the teeth of said ratchet '11 and when freed therefrom the valve may he turned "in a direction opposite to said spring or it may While I have herein shown and described merely for illustrative purposes one specific embodiment of my invention, and have disin detail the construction and arrangement incidental to such disclosure it is distinctly details or relative arrangement of artsnor to the specific application herein s own but extensive variations from the illustrations may be made withoutdeparting from the principles thereof.

' laims 1. In combination, a burner, a valve therefor; a toothed disk attached to said'valve,

a pivoted'membe'r, a thermostat connected stationary and thus effect a for, a toothed disk be released so as to perm1t sald spring to entirely close the valve.

to be understood that: the invention is limited nei her to the mere.

in' presence '0 Witnesses: L

with said member and ed by heat from said burner to rock said adapted to beexpand- I pivotedmember, a disk-engaging member I movablymounted in said pivotedmember to engage the-teeth of sa1d disk, and resilient means interposed between said'pivoted member and said disk-engaging memberadapted normally to effect a combined mcve- 2. In combination, a burner, a valve-there attach'edto said valve, a pivoted lever, a thermostat connected with said lever and.

adapted to expand 'by heat from said burner to rock saidzlever, ajp1nslidably mounted in said lever to engage said teeth and maintain said disk in a determined gosition, and asp'ring inter between sai pre- osed pin and said lever to e ect a combined movement of said pin and lever.

3. In combination, a burner, avalve there- 1 for, a toothed disk attached to said valve, a

pivoted lever, a thermostat connected with said lever and adapted to expand by heat from said burner to rock said lever, a pin slidably .mounted in said lever to engage said teeth and maintain said disk in' a determined pqsition, a tween said pinandsaid lever to efiect, a combinedjmovementpf said pin and lever, and manual means to move said pin independently of said lever to release said valve.- Intestimon whereoflaifix mysignature two witnesses.

I AXEL'UNOSKRNMARK.

GUs HYLANDER, j GUST An WKHnsrniiM.

pre-'. spring interposed be-' 

